Word 2000 hyperlinks gone in Word 97 (Word 97 SR-2)

We subscribe to a newsletter created in Word 2000, containing hyperlinks to Internet URLs, but when the doc is opened in Word 97 the hyperlinks don't work. Right-clicking on one yields a pop-up menu that indicates the selection is a hyperlink, but I can't open it. The same doc opened in Word 2000 or 2002 maintains the hyperlinks OK. Any ideas? Thanks,
Doug